Tripping mechanism for hoisting buckets



Dec. 1, 1931. F. SCHMITT TRIPPING MECHANISM FOR HOISTING BUCKETS Filed March 31, 1930 2 Sheets-Sheet 1 INVENTOR. I E 50/2/7225.

AT ORNEY.

Dec. 1, 1931. F. SCHMITT TRIPPING MECHANISM FOR HOISTING BUCKETS Filed March 51, 1930 2 Sheets-Sheet 2 INVENTOR: ELSCfiWZZZZ 7 fl 1 0/0 A j m 9 r0 iz l v m 0/0 m w a A 6 m 9 1 LnLl M V A TTORNEY Patented Dec. 1, 1931 UNI E STATES PATE T] OFFICE;

FRED sonmrrr, orpivivimsrrv cI'rY, russ'otmr rnrrrnve. MECHANISM ron norsrme rucxnrs Application 1am March 31,1930. Serial No. 440,456.

My invention relates to hoisting mecha nism and more particularly to tripping mech anism for releasing a skip bucket during its ascent to allow, it to be tilted for dumping the contents thereof and guide means for returning the bucket to its normal upright position duringdescending movement thereof v vide a skip bucket with laterally directed ears adapted to be engaged by pivoted latch members carried by a, hoistingframefor holding the bucket in its normal .upright position and to provide means supported by a tower the provision of a tripping mechanism for hoisting buckets which possesses advantages in points of simplicity and efliciency, and,

at the same time proves itself comparatively inexpensive in cost of manufacture.

With the above and other objects/in view, the invention consists in the novel features'of construction, arrangement .and combination of parts hereinafter more fully described and finally pointed out in the claims hereto appended.

Referring to theaccompanying drawings forming a part of this specification, wherein like characters ,of reference denote; similar parts throughout the several views: I

Fig. 1 is a side elevation of the skip bucket trippingmechanism embodying the features of my invention.

Fig. 2 is a rear elevation thereof.

Fig. 3 is a top plan View of my invention.-

Referring to the drawings, the reference numeral A designates asuitable tower providedwwith suitable opposed vertical track members or tubular guides 1 for, guiding a hoisting frameB in its up and down movements of travel inthe tower by means of a cable2. p

Thehoisting frame consists of a top cross beam 3 to each endv of which is secured the lt is the object of myinventionto proupper ends of a pair of spaced angle, iron members 4 to provide a way -5 to receive, the

vertically. disposed guides .1 and by which the frame is guided in its up and down move-1 ments. The angle iron'members lare'con- 55 v nected to the cross beam 3 by suitable angle plates ortheir equivalent 6. The lower end of-the hoisting frame .e mbodies'a fixed cross shaft 7 which is connected to'and supported by end plates 8 which aresuitably secured 0o tothe lower ends ofthe angle iron members .4. Included in the hoisting framestructure are a pair of'vertically disposed membersQ .whichare connected at their upper ends with the cross beam 3 andat their lower endswith go I the cross shaft 7, asshownin Fig. 2.,

A skip bucket 10 adapted o carry w'et con crete or any other ,desiredfmaterial is pivotallysupported at its lower end upon the cross shaft {through the medium of a pair of suit- 10 able bearings 11 carried by theqbucket 10.

The skip bucket 10 is disposed in the uprights 9, of the hoisting: frame, as shown in Fig. 2. i 7

A'crossshaft 12 the upper ends of the frame uprights 9 just below the cross beam 3. The shaft 12 is pro- .vided with a bucket trip Iever'13 directed rearwardly and downwardly from the. shaft 12. The trip lever 13 isadjustably fixed to J0 the cross shaft 12 near one end thereof so as to impart rotation to the shaft 12 as will be apparent hereinafter.

, lPivota lly connected to a. pair of rods '14 carriedby the uprights 9fand the angle iron 385 member 4 and disposed atop ositesides of the I skip bucket 10 adjacent t e upper edge thereof, are a pair of latch members 15 each having a shoulder 16 adapted to normally contact with the front faces of a'pair of lat- .80 erally directed-ears 17 carried by the side walls of the bucket 10 for holding the bucket in its upright position relative to the hoisting frame, aswill be apparent from'Figs. 1

and: 3. "A suitable upright link 18 connects ".95

each latch member 115 witha'pair; of fixed lever arms 19 carried by and directed forwardly from the rotatablecrossshaft 12 so that the latch members 15 will be raised and loweredin unison the fixed lever arms! isljournaled its endsjin 15 r,...z D.

19. A coiled spring 20 connects each lever arm 19 with the uprights '9 of the hoisting frame so as to normally hold the lever arms 19 and the latch members in their closed 0r lowermost positions. Should one of the springs break during operations, the other spring Will beps'uflicient' to move'the latch members 15 into their closed positions'in contact with the bucket ears 1 The bucket 10 is -provided on its front wall with a fixed runner member or skid 21 adapted for contact with'a vertically dis--;

posed guide member 22 carried by the frame Work of the tower A during ascending movementsof the bucket 10 just prior to tilting movement thereof and to move the bucket 10 vto upright"position from'a tilted position (il u'ring descending movement of the bucket "j' The tower Ajisl provided with a vertical .channeled guide member 28 against whicht-he free end portion of" the trip'le.Ver";13 strikes 7 gduringfascent of the bucket 10 for unlatch'ing ithe latch'members 1519mm the laterallydi; "reared bucket ears 17'When the bucketflQha 's reached a predetermined elevation in? the tower, thereby unlocking the bucket1-0- relai ltive'to the hoisting frame sothat the bucket will tilt forward by gravity and discharge the contents thereof, such as wet concrete into asuitable'hoppe'r 24: located outside; the

tower A-and from which itis" carried by 'gravity to anyplace remotefrom the tower.

towenthat it will be unlocked at a predeter- "mined'felevation to permit'tilting movement ,thereof. and ."that i it "will be securely locked charging its contents.

1 The lat ch fmembers 1'5 remain intheir'eleyated'position during the period of time the bucket is discharging its contents and is again "lowered for locking the bucket 10 in its upright positionrelati've to the hoisting frame when the bucket 10 hasdescended sufficient vtopjright the bucket, which position is shown ffullilinesin Fig. 1. Thedotted line positions in Fig. "1 illustrate the bucket 10 in its dumping position and the tripping lever 13 andlat'ch members 15 in the positions they assume while the bucket 10is tilted for dis-' Tripping mechanisms heretofore employed have been very inefficient andunde- .pendableand have caused much grief 'to the hoisting engineer as the mechanism could not be depended upon to lock the bucket; in its upright position at a predetermined eleva- -,tion, or unlock the bucket when desired. A

;.From' the foregoingfdescriptioni taken withthedrawings, it is apparentthatl' pro- ;videa .mechanism that will positively :hold

the=bucket-10 in an upright locked; position relative tothe hoisting frame until it has reached -a predeterminedelevation in a agaii' itsupright position. relative to the hoisting frame at a predetermined elevation during the descent-of the bucket after it has been tilted and discharged its contents I have not illustrated the entire height of a tower, but merely enough to show its relation to the hoisting frame and bucket, 7

the bucket closing guide and the bucket tripping lever and its guide member. *The many advantagesof-the herein described invention will readily suggest themselves. to those skilled. in the art to which it'appertains.

- F rom the;foregoing'description, it is evident that a simple device for this purpose that I do not desire to restrict, or limit myself to the very details of the construction "shown and described, which is merely-illusihas been disclosed, but it is to be understood i up and down upon said track, a bucket pivloted to 'said framefandhavingitscenter of gravity so disposed-relative to the frame as i to cause the bucket to tip forwardly for dis-I charging the contents thereof, locking means for h'olding the bucketin: an upright positioir relative to the frame, means forunloekthe 'bucket' from theframe 'to permit tilting movement thereof when it "has 'as- I eendedfto j a predetermined elevat1on-with 1n the tower,"-*sa1d means 1 lncludlng :a rock- Shaft carried bythe hoisting frame trans-V versel'y 'of and above thebucket, a"-latch pivoted to the" hoisting frame toengage a bucket protrusior means connecting 'the latch with the rockshaft,a trip lever extending from the ro'cl zshaf-t to :slidably engage a" trip bar carriedby the hoisting-frame, and means for-rightingthe bucketlto its upright positionas'it starts todescend'in the tower to enable the locking'meansto again hold the'bucket in its upri'ght'position'untilagain unlocked for tilting movement relative to the: frame.

2. In combination with tower-having a vertical track, ahoisting frame andr a tilt I able-bucket for-ysaid frame, of a'rockshaft carried by the hoisting frame above the bucket, alatch member pivotally carried by the hois'ting frame below one end .of the "rockshaft, an arm fixed to the rockshaft, a

link connection"between the arm of the rockshaft and the latch member, an ear. directed 'from on'e of the side walls of thebucketfor the latch member to engage to holdfithe.

bucket in its upright'p'ositionya trip lever arm carried by the rockshaft,-means jcarried by the tower upon I which [the trip lever rides when the bucket has ascended to predetermined elevation in the tower for imparting movement to the rockshaft for raising the latch member to unlock the bucket relative to the frame and permit the bucket to tip forwardly and discharge its contents, and resilient means for lowering the latch member for locking the bucket in its upright position relative to the frame when the frame and bucket have reached a predetermined elevation in the tower the descent of the bucket.

3. In combination with a tower structure including a vertical track upon which a hoisting frame is mounted for up and down movements, an ofi balanced skip bucket hingedly supported by said frame, an ear directed outwardly from one of the side walls of the bucket, a latch member pivoted to the frame adapted to engage said ear for holding the bucket in an upright position, a rockshaft carried by the hoisting frame, a trip lever fixed to the rockshaft, a connection between the rockshaft and the latch member, means carried bythe tower along during which the trip lever slides when the frame and bucket carried thereby reach a predetermined elevation in ascending the tower for imparting movement to the rockshaft to retract the latch member from the bucket ear thereby releasing the bucket to permit it to tip forwardly to discharge the contents thereof, and means carried by the tower and the bucket to return the bucket to its upright position relative to the frame during the initial part of the descent of the frame and bucket and resilient means to bring the latch member back into engagementwith the bucket ear after the bucket has been returned to its upright position and the trip lever has released itself from sliding contact with the means carried by the tower to again lock the bucket relative to the frame.

4. In combination, a tower including a vertical track, va hoisting frame mounted for sliding movement upon said track, a bucket mounted in said frame having its center of gravity so disposed as to causeit to tip forwardly for discharging its contents, a rotatable cross shaft carried by the frame, a pair of spaced forwardly directed latch members pivoted to said frame, a pair of arms fixed to said shaft and disposed above said latch members, links connecting the latch members with the arms, coiled expansion springs connecting the arms with the frame for normally holding the arms and latch members in their lowermost positions, ears directed laterally from thejside walls of-the bucket to be engaged by the latch members for holding the bucket in a vertical position relative to the frame, a vertically disposed trip bar carried by the tower at a predetermined elevation, a trip arm directed downwardly and rearwardly from the aforesaid shaft-adapted to be moved'forwardly in an arcuate path when brought into sliding con tact with the verticallydisposed trip bar/ upon ascension of "the frame and bucket to rotate the cross shaft and release the latch member from'contact with thebucket ears to allow the bucket to" tip forwardly and discharge its contents and means carried by the tower andthe front wall of the bucket adapted for sliding engagement to swing the empty bucket fromitstipped position-into its upright-position during descent of the bucket within the tower so that thebucket will again be held against tippingforwardly by the latch member upon disengagementof the trip arm with the trip bar.

7 5. Adevice for hoistingand discharging wet concrete from skip'buckets at predetermined elevations during the construction of a building, comprising, in combination, a

relativeto the frame, a vertically disposed s tripbar fixed: at a predetermined elevation to the tower, an inclined plane formed at the lower end of'th etrip bar, a trip lever arm fixed to and directed from the ro'ckshaft'for sliding contact with the trip bar shaft for releasing the bucket to permit tilt- ,ing thereof to. discharge its contents and'resilientrmeans 'forre-turning the trip leverarnl to its normal position after descending below the trip bar fixed to the tower. t r

6. A'device for hoisting and discharging wet concrete from skip bucketsat predetermined elevatioiis during the construction of a building, comprising, in combination, a tower including opposed guide rails to provide atrack,acarr1age including a frame to'impart ro- I tary movement in one direction to the rockridable up and down on said track and a a bucket tiltably supported by said frame, a rockshaftmountedin said frame and. dis- 1 posedabove the tiltable bucket, means connecting the bucket I with the rockshaft for locking the bucket in'an upright position relativeto the frame, a vertically disposed trip bar fixed at a predetermined elevation' to the tower, an inclined plane formed at the lower end of the trip bar, a trip lever arm fixed to andsdirected from the rockshaft for 'sliding contact with the trip bar to impart r0- tary movement in one direction to the rockshaft for releasing the bucket to permit tilting thereof to discharge its contents, resilient means for returning the trip lever arm-to its normal position after descending below the tacting means for elevating the bucket from trip bar fixed to the tower and slidable conits tilted position toits upright position during the'initial movement ofits descent. X H 7. In comb'nation, a tower having a vertical track, a hoisting frame mounted for up 5 and down travel on said frame, a tiltable wet concrete carrying bucket supported by said v v I hoisting frame, a rockshaft carried by the hoisting frame above the bucket, a pair of laterally directed ears secured to the side walls 10 otthe bucket nearthe upper edges thereof,;apair of latch members pivotally connested to opposite sides of the hoisting frame below therockshaft to normally engage said bucket ears, a-pair of arms fixed to said rock- 15 shaftand disposed above the latch members,

" links connecting the arms with the latch members, resilient means for holding the latch members incontact with ears of the bucket, a trip lever arm fixed to and directed so downwardly and rearwardly, from the rockshaft and a fixed trip bar having an inclined "lower end for initial engagement with the trip leverarm to movethe trip lever arm and v impart movementv to the rockshaft for elevating the latch members from contact with the bucket ears just .prior .to dumping op- 'eration of the bucket. 1 I

8 In combination, a tower having a vertical track,"a ho1st1ng frame mounted for up w and-down travel. on said "frame, a tiltable wet concrete. carrying bucketsupported by *said u 7 hoisting frame, a rockshaft carriedby the hoisting frame j above the bucket, a pairv of laterally, directed-ears secured to the side Walls of the bucket near the upper edges thereof, a'pairfof latch members pivotally con-- nected to; opposite sidesof the hoisting framey below the rockshaft to. normallyengage said bucket ears, a pair or" armsjfixed to said rock- 4 shaft and disposed above the latch members,

links connecting the arms, with the latch members, resilient: meansfor holding the latch members in, contact with ears of the bucket, a trip lever arm fixed to and directeddownwardly and rearwardly from the rock- I shaft, a fixed trip. bar having aninclined lower end for in tial engagement'with the trip a lever arm ;to move the trip *leven arm and impart movement to the rockshaft for elevating the latch members from contact with the buckets a rs just prior to dumping operation of the bucket and means carried f by the tower and thebucket for righting the bucketfr'omits tilted dumping position to its upright position upon descent of the bucket.

' in testimony whereof, I have hereunto at- ,lfiXed my signature.

. w FREDSOHMIT'D: 

